Siemens sinumerik 840D sl Operating Manual page 267

1. The tool bores at drilling feedrate F1 to the first drilling depth D. If the final drilling depth
2. If another feedrate FR is required for through-boring, the residual drilling depth ZR is
3. If required, the tool traverses back to the workpiece surface for stock removal before
4. The tool traverses to the starting position for thread milling.
5. The thread milling is carried out (climbing, conventional or conventional + climbing) with
Procedure
Parameters, G code program
PL Machining plane
RP Retraction plane
SC Safety clearance
Parameters Description
Single position
Machining 
position
Drill hole at programmed position
Position pattern

Position with MCALL
F1 Drilling feedrate
Z0 Reference point Z
Z1 Thread length (inc) or end point of the thread (abs)
Turning
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Z1 is not reached, the tool will travel back to the workpiece surface in rapid traverse for
stock removal. Then the tool will traverse with rapid traverse to a position 1 mm above the
drilling depth previously achieved - allowing it to continue drilling at drill feedrate F1 at the
next infeed. Parameter "DF" is taken into account from the 2nd infeed and higher (refer to
the table "Parameters").
drilled with this feedrate.
thread milling with rapid traverse.
milling feedrate F2. The thread milling acceleration path and deceleration path is
traversed in a semicircle with concurrent infeed in the tool axis.
1. The part program or ShopTurn program to be processed has been
created and you are in the editor.
2. Press the "Drilling" softkey.
3. Press the "Thread" and "Cut thread" softkeys.
The "Drilling and thread milling" input window opens.
mm
mm
Programming technology functions (cycles)
Parameters, ShopTurn program
T Tool name
D Cutting edge number
F Feedrate
S / V Spindle speed or constant
cutting rate
8.1 Drilling
mm/min
mm/rev
rpm
m/min
Unit
mm/min
mm/rev
mm
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